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Electric Traction

Electric Traction
If the coefficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails?

0.26
0.46
0.16
0.35

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Electric Traction
The air resistance to the movement of the train is proportional to

(speed)3
1/speed
speed
(speed)2

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Electric Traction
The wheels of a train, engine as well as bogies, are slightly tapered to

Facilitate in taking turns
Reduce friction
Facilitate braking
Increase friction

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Electric Traction
_________ locomotive has the highest operational availability.

Steam
All of the listed here
Electric
Diesel

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Electric Traction
The normal value of adhesion friction is

0.50
0.30
0.25
0.35

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Electric Traction
In a steam locomotive electric power is provided through

Battery system
Small turbo-generator
Overhead wire
Diesel engine generator

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